CN111511025B - Power control method and terminal equipment - Google Patents

Power control method and terminal equipment Download PDF

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Publication number
CN111511025B
CN111511025B CN201910101907.XA CN201910101907A CN111511025B CN 111511025 B CN111511025 B CN 111511025B CN 201910101907 A CN201910101907 A CN 201910101907A CN 111511025 B CN111511025 B CN 111511025B
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information
terminal device
channel
feedback
parameter
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CN111511025A (en
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刘哲
张兴炜
黎超
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to PCT/CN2020/072548 priority patent/WO2020156214A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0473—Wireless resource allocation based on the type of the allocated resource the resource being transmission power
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/241—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account channel quality metrics, e.g. SIR, SNR, CIR or Eb/lo
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/242—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account path loss
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/30—Transmission power control [TPC] using constraints in the total amount of available transmission power
    • H04W52/36—Transmission power control [TPC] using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The application provides a power control method and terminal equipment, wherein the method comprises the following steps: the method comprises the steps that a first terminal device determines the transmitting power of a data channel; the data channel comprises first information, wherein the first information comprises feedback information; and the first terminal equipment sends the feedback information to the second terminal equipment by the transmitting power of the data channel. Correspondingly, the application also provides a corresponding device. By adopting the method and the device, the power can be reasonably controlled.

Description

Power control method and terminal equipment
Technical Field
The present disclosure relates to the field of communications technologies, and in particular, to a power control method and a terminal device.
Background
Under the network of long term evolution (long term evolution, LTE) technology proposed by the third generation partnership project (the 3rd generation partnership project,3GPP), vehicle-to-everything communication (V2X) is proposed, V2X communication refers to vehicle-to-outside everything communication, including vehicle-to-vehicle communication (vehicle to vehicle, V2V), vehicle-to-pedestrian communication (vehicle to pedestrian, V2P), vehicle-to-infrastructure communication (vehicle to infrastructure, V2I), vehicle-to-network communication (vehicle to network, V2N).
V2X communication is a basic technology and a key technology applied to high-speed equipment represented by vehicles in the scene with very high requirements on communication delay in the future, such as intelligent automobiles, automatic driving, intelligent transportation systems and the like. Based on V2X communication, the vehicle user can send some information of the vehicle user itself, such as information of position, speed, intention (turning, doubling, reversing) and other periodic and some aperiodic event-triggered information to surrounding vehicle users, and similarly, the vehicle user can also receive information of surrounding users in real time.
Among the traffic types that LTE-V2X is mainly facing are broadcast messages, no hybrid automatic repeat request (hybrid automatic repeat request, HARQ) feedback, and channel state information (channel state information, CSI) feedback, etc.
However, the traffic type in NR-V2X may also be unicast, multicast, etc., and thus how to perform power control allocation and power control in NR-V2X is in need of solution.
Disclosure of Invention
The application provides a power control method and terminal equipment, which can reasonably control the transmitting power of different channels.
In a first aspect, an embodiment of the present application provides a power control method, including: the method comprises the steps that a first terminal device determines the transmitting power of a data channel; the data channel comprises first information, wherein the first information comprises feedback information; and the first terminal equipment sends the feedback information to the second terminal equipment by the transmitting power of the data channel.
In the embodiment of the application, when the time-frequency domain resource of the data channel is overlapped with that of the feedback channel, the feedback information can be sent along with the data channel, so that the embodiment of the application improves the transmitting power of the data channel, and the transmitting power of the data channel under the condition is more accurately distributed.
With reference to the first aspect, in one possible implementation manner, the transmission power of the data channel is determined according to the maximum transmission power, the bandwidth of the data channel and a first adjustment parameter; or, the transmitting power of the data channel is determined according to the maximum transmitting power, the bandwidth of the data channel, the bandwidth of the control channel and the first adjustment parameter.
In this embodiment of the present application, the first adjustment parameter may be understood as a parameter capable of adjusting the transmission power of the data channel, and the first adjustment parameter may be a parameter related to feedback information, so that when the terminal device allocates the transmission power of the data channel, the terminal device may adjust the transmission power of the data channel according to the actual information transmitted in the data channel, and further improve the accuracy of the transmission power of the data channel.
With reference to the first aspect or any possible implementation manner of the first aspect, the first adjustment parameter is determined according to a first sub-parameter and a second sub-parameter, where the first sub-parameter is a parameter related to adjusting a coding strategy MCS, and the second sub-parameter is a parameter related to a number of resource elements REs of the data channel and a size of a coding block, or the second sub-parameter is a parameter related to a number of REs of the data channel and a bit number of the feedback information.
With reference to the first aspect or any one of possible implementation manners of the first aspect, the first adjustment parameter is determined according to a first sub-parameter, a second sub-parameter and a third sub-parameter, where the first sub-parameter is a parameter related to adjusting a coding strategy MCS, the second sub-parameter is a parameter related to a number of resource elements REs of the data channel and a size of a coding block, or the second sub-parameter is a parameter related to a number of REs of the data channel and a number of bits of the feedback information, and the third sub-parameter is an offset parameter related to a number of bits of the feedback information.
With reference to the first aspect or any possible implementation manner of the first aspect, the feedback information includes hybrid automatic repeat request HARQ information, or the feedback information includes reference information, or the feedback information includes the HARQ information and the reference information; wherein the reference information comprises information between the first terminal device and the second terminal device and/or information between the first terminal device and a network device.
With reference to the first aspect or any possible implementation manner of the first aspect, the reference information includes one or more of reference state information between the first terminal device and the second terminal device, reference signal received power, reference signal received quality, and path loss information between the first terminal device and the second terminal device.
With reference to the first aspect or any one of the possible implementation manners of the first aspect, the reference information includes information related to a distance.
With reference to the first aspect or any possible implementation manner of the first aspect, the information related to the distance includes one or more of distance information between the first terminal device and a network device, distance information between the first terminal device and the second terminal device, communication distance information covered by the first terminal device, and feedback information that the first terminal device is within a coverage range of the network device.
With reference to the first aspect or any one of possible implementation manners of the first aspect, a transmission power of the data channel satisfies the following formula:
P 1 ＝min{P CMAX ,f 1 (M 1 )+P O +α×PL+β}
wherein the P is 1 For the transmission power of the data channel, the P CMAX For the maximum transmit power, f 1 (M 1 ) For the bandwidth M of the data channel 1 Is a function of said P O And for the target received power of the second terminal equipment, the PL is a path loss estimated value, and the beta is the first adjustment parameter.
With reference to the first aspect or any one of possible implementation manners of the first aspect, a transmission power of the data channel satisfies the following formula:
P 1 ＝f 2 (M 1 +M 2 )+min{P CMAX ,f 3 (M 1 +M 2 )+P O +α×PL+β}
Wherein the P is 1 For the transmission power of the data channel, the P CMAX For the maximum transmit power, f 2 (M 1 +M 2 ) And said f 3 (M 1 +M 2 ) The bandwidths M of the data channels respectively 1 And the bandwidth M of the control channel 2 Is a function of said P O For the target received power of the second terminal device, anPL is the path loss estimate and β is the first adjustment parameter.
With reference to the first aspect or any one of possible implementation manners of the first aspect, a transmission power of the data channel satisfies the following formula:
P 1 ＝min{P CMAX -f 4 (M 1 +M 2 ),f 3 (M 1 +M 2 )+P O +α×PL+β}
wherein the P is 1 For the transmission power of the data channel, the P CMAX For the maximum transmit power, f 3 (M 1 +M 2 ) And said f 4 (M 1 +M 2 ) The bandwidths M of the data channels respectively 1 And the bandwidth M of the control channel 2 Is a function of said P O And for the target received power of the second terminal equipment, the PL is a path loss estimated value, and the beta is the first adjustment parameter.
In a second aspect, embodiments of the present application further provide a power control method, including: the first terminal equipment determines the transmitting power of a feedback channel; wherein the feedback channel and the data channel have time domain overlapping and frequency domain overlapping, or the feedback channel and the data channel have frequency domain overlapping and no time domain overlapping, or the feedback channel and the data channel have time domain overlapping and no frequency domain overlapping; and the first terminal equipment sends feedback information to the second terminal equipment by the transmitting power of the feedback channel.
In this embodiment of the present application, the multiplexing manner between the feedback channel and the data channel may include multiple possibilities (i.e., different frame structures), for example, the feedback channel may have time domain overlapping and frequency domain overlapping with the data channel, for example, the feedback channel may have frequency domain overlapping and no time domain overlapping with the data channel, and for example, the feedback channel may have time domain overlapping and no frequency domain overlapping with the data channel, where different multiplexing manners correspond to different transmission powers, so that the terminal device may determine the transmission power of the feedback channel according to one of multiple possibilities, and avoid determining the transmission power of the feedback channel by adopting one manner under all conditions, thereby effectively improving accuracy of determining the transmission power of the feedback channel and reasonably controlling the transmission power of the feedback channel.
With reference to the second aspect, in one possible implementation manner, the transmission power of the feedback channel is determined according to a maximum transmission power, a bandwidth of the feedback channel, a bandwidth of the data channel, a power difference between the feedback channel and the data channel, and a second adjustment parameter; or, the transmitting power of the feedback channel is determined according to the maximum transmitting power, the bandwidth of the feedback channel, the bandwidth of the control channel, the power difference between the feedback channel and the control channel and the second adjustment parameter.
In the embodiment of the present application, the transmission power of the feedback channel may be determined according to different frame structures.
With reference to the second aspect or any one of possible implementation manners of the second aspect, the second adjustment parameter is configured by higher layer signaling, or the second adjustment parameter is predefined.
With reference to the second aspect or any one of possible implementation manners of the second aspect, the second adjustment parameter is related to a number of bits of the feedback information and a number of resource elements REs of the feedback channel.
With reference to the second aspect or any one of the possible implementation manners of the second aspect, a power difference between the feedback channel and the data channel is predefined, or the power difference between the feedback channel and the data channel is indicated by control information; or, the power difference between the feedback channel and the data channel is configured by high-layer signaling; the power difference between the feedback channel and the control channel is predefined, or the power difference between the feedback channel and the control channel is indicated by the control information; alternatively, the power difference between the feedback channel and the control channel is configured by the higher layer signaling.
With reference to the second aspect or any one of possible implementation manners of the second aspect, the feedback information includes hybrid automatic repeat request HARQ information, or the feedback information includes reference information, or the feedback information includes the HARQ information and the reference information; wherein the reference information comprises information between the first terminal device and the second terminal device and/or information between the first terminal device and a network device.
With reference to the second aspect or any one of the possible implementations of the second aspect, the reference information includes one or more of reference state information between the first terminal device and the second terminal device, reference signal received power, reference signal received quality, and path loss information between the first terminal device and the second terminal device.
With reference to the second aspect or any one of the possible implementation manners of the second aspect, the reference information includes information related to a distance.
With reference to the second aspect or any possible implementation manner of the second aspect, the information related to the distance includes one or more of distance information between the first terminal device and a network device, distance information between the first terminal device and the second terminal device, communication distance information covered by the first terminal device, and feedback information that the first terminal device is within a coverage range of the network device.
With reference to the second aspect or any one of possible implementation manners of the second aspect, the transmission power of the feedback channel satisfies the following formula:
P 2 ＝f 5 (M 1 +M 3 )+min{P CMAX ,f 6 (M 1 +M 3 )+P O +α×PL+Δ}
wherein the P is 2 For the transmit power of the feedback channel, the P CMAX For the maximum transmit power, f 5 (M 1 +M 3 ) And said f 6 (M 1 +M 3 ) The bandwidths M of the data channels respectively 1 Bandwidth M of the feedback channel 3 And a function of the power difference of the feedback channel and the data channel, the P O For the purpose of the second terminal equipmentAnd marking the received power, wherein PL is a path loss estimated value, and delta is the second adjustment parameter.
With reference to the second aspect or any one of possible implementation manners of the second aspect, the transmission power of the feedback channel satisfies the following formula:
P 2 ＝f 7 (M 2 +M 3 )+min{P CMAX ,f 8 (M 2 +M 3 )+P O +α×PL+Δ}
wherein the P is 2 For the transmit power of the feedback channel, the P CMAX For the maximum transmit power, f 7 (M 2 +M 3 ) And said f 8 (M 2 +M 3 ) The bandwidths M of the control channels respectively 2 Bandwidth M of the feedback channel 3 And a function of the power difference of the feedback channel and the control channel, the P O And for the target received power of the second terminal equipment, the PL is a path loss estimated value, and the delta is the second adjustment parameter.
In a third aspect, an embodiment of the present application provides a power control apparatus, including: a processing unit for determining the transmission power of the data channel; the data channel comprises first information, wherein the first information comprises feedback information; and the sending unit is used for sending the feedback information to the second terminal equipment at the transmitting power of the data channel.
With reference to the third aspect, in one possible implementation manner, the transmission power of the data channel is determined according to the maximum transmission power, the bandwidth of the data channel and the first adjustment parameter; or, the transmitting power of the data channel is determined according to the maximum transmitting power, the bandwidth of the data channel, the bandwidth of the control channel and the first adjustment parameter.
With reference to the third aspect or any one of possible implementation manners of the third aspect, the first adjustment parameter is determined according to a first sub-parameter and a second sub-parameter, where the first sub-parameter is a parameter related to adjusting a coding strategy MCS, and the second sub-parameter is a parameter related to a number of resource elements REs of the data channel and a size of a coding block, or the second sub-parameter is a parameter related to a number of REs of the data channel and a bit number of the feedback information.
With reference to the third aspect or any one of possible implementation manners of the third aspect, the first adjustment parameter is determined according to a first sub-parameter, a second sub-parameter and a third sub-parameter, where the first sub-parameter is a parameter related to adjusting a coding strategy MCS, the second sub-parameter is a parameter related to a number of resource elements REs of the data channel and a size of a coding block, or the second sub-parameter is a parameter related to a number of REs of the data channel and a number of bits of the feedback information, and the third sub-parameter is an offset parameter related to a number of bits of the feedback information.
With reference to the third aspect or any possible implementation manner of the third aspect, the feedback information includes hybrid automatic repeat request HARQ information, or the feedback information includes reference information, or the feedback information includes the HARQ information and the reference information; wherein the reference information comprises information between the first terminal device and the second terminal device and/or information between the first terminal device and a network device.
With reference to the third aspect or any one of the possible implementation manners of the third aspect, the reference information includes one or more of reference state information between the first terminal device and the second terminal device, reference signal received power, reference signal received quality, and path loss information between the first terminal device and the second terminal device.
With reference to the third aspect or any one of the possible implementation manners of the third aspect, the reference information includes information related to a distance.
With reference to the third aspect or any one of the possible implementation manners of the third aspect, the distance-related information includes one or more of distance information between the first terminal device and a network device, distance information between the first terminal device and the second terminal device, communication distance information covered by the first terminal device, and feedback information that the first terminal device is within the coverage of the network device.
With reference to the third aspect or any one of the possible implementation manners of the third aspect, the transmission power of the data channel satisfies the following formula:
P 1 ＝min{P CMAX ,f 1 (M 1 )+P O +α×PL+β}
wherein the P is 1 For the transmission power of the data channel, the P CMAX For the maximum transmit power, f 1 (M 1 ) For the bandwidth M of the data channel 1 Is a function of said P O And for the target received power of the second terminal equipment, the PL is a path loss estimated value, and the beta is the first adjustment parameter.
With reference to the third aspect or any one of the possible implementation manners of the third aspect, the transmission power of the data channel satisfies the following formula:
P 1 ＝f 2 (M 1 +M 2 )+min{P CMAX ,f 3 (M 1 +M 2 )+P O +α×PL+β}
Wherein the P is 1 For the transmission power of the data channel, the P CMAX For the maximum transmit power, f 2 (M 1 +M 2 ) And said f 3 (M 1 +M 2 ) The bandwidths M of the data channels respectively 1 And the bandwidth M of the control channel 2 Is a function of said P O And for the target received power of the second terminal equipment, the PL is a path loss estimated value, and the beta is the first adjustment parameter.
With reference to the third aspect or any one of the possible implementation manners of the third aspect, the transmission power of the data channel satisfies the following formula:
P 1 ＝min{P CMAX -f 4 (M 1 +M 2 ),f 3 (M 1 +M 2 )+P O +α×PL+β}
wherein said at least one ofThe P is 1 For the transmission power of the data channel, the P CMAX For the maximum transmit power, f 3 (M 1 +M 2 ) And said f 4 (M 1 +M 2 ) The bandwidths M of the data channels respectively 1 And the bandwidth M of the control channel 2 Is a function of said P O And for the target received power of the second terminal equipment, the PL is a path loss estimated value, and the beta is the first adjustment parameter.
In a fourth aspect, embodiments of the present application further provide a power control apparatus, including: a processing unit, configured to determine a transmit power of a feedback channel; wherein the feedback channel and the data channel have time domain overlapping and frequency domain overlapping, or the feedback channel and the data channel have frequency domain overlapping and no time domain overlapping, or the feedback channel and the data channel have time domain overlapping and no frequency domain overlapping; and the sending unit is used for sending feedback information to the second terminal equipment by the transmitting power of the feedback channel.
With reference to the fourth aspect, in one possible implementation manner, the transmission power of the feedback channel is determined according to a maximum transmission power, a bandwidth of the feedback channel, a bandwidth of the data channel, a power difference between the feedback channel and the data channel, and a second adjustment parameter; or, the transmitting power of the feedback channel is determined according to the maximum transmitting power, the bandwidth of the feedback channel, the bandwidth of the control channel, the power difference between the feedback channel and the control channel and the second adjustment parameter.
With reference to the fourth aspect or any one of the possible implementation manners of the fourth aspect, the second adjustment parameter is configured by higher layer signaling, or the second adjustment parameter is predefined.
With reference to the fourth aspect or any one of possible implementation manners of the fourth aspect, the second adjustment parameter is related to a number of bits of the feedback information and a number of resource elements REs of the feedback channel.
With reference to the fourth aspect or any one of possible implementation manners of the fourth aspect, a power difference between the feedback channel and the data channel is predefined, or the power difference between the feedback channel and the data channel is indicated by control information; or, the power difference between the feedback channel and the data channel is configured by high-layer signaling; the power difference between the feedback channel and the control channel is predefined, or the power difference between the feedback channel and the control channel is indicated by the control information; alternatively, the power difference between the feedback channel and the control channel is configured by the higher layer signaling.
With reference to the fourth aspect or any possible implementation manner of the fourth aspect, the feedback information includes hybrid automatic repeat request HARQ information, or the feedback information includes reference information, or the feedback information includes the HARQ information and the reference information; wherein the reference information comprises information between the first terminal device and the second terminal device and/or information between the first terminal device and a network device.
With reference to the fourth aspect or any one of the possible implementation manners of the fourth aspect, the reference information includes one or more of reference state information between the first terminal device and the second terminal device, reference signal received power, reference signal received quality, and path loss information between the first terminal device and the second terminal device.
With reference to the fourth aspect or any one of the possible implementation manners of the fourth aspect, the reference information includes information related to a distance.
With reference to the fourth aspect or any possible implementation manner of the fourth aspect, the information related to the distance includes one or more of distance information between the first terminal device and a network device, distance information between the first terminal device and the second terminal device, communication distance information covered by the first terminal device, and feedback information that the first terminal device is within a coverage range of the network device.
With reference to the fourth aspect or any one of possible implementation manners of the fourth aspect, the transmission power of the feedback channel satisfies the following formula:
P 2 ＝f 5 (M 1 +M 3 )+min{P CMAX ,f 6 (M 1 +M 3 )+P O +α×PL+Δ}
wherein the P is 2 For the transmit power of the feedback channel, the P CMAX For the maximum transmit power, f 5 (M 1 +M 3 ) And said f 6 (M 1 +M 3 ) The bandwidths M of the data channels respectively 1 Bandwidth M of the feedback channel 3 And a function of the power difference of the feedback channel and the data channel, the P O And for the target received power of the second terminal equipment, the PL is a path loss estimated value, and the delta is the second adjustment parameter.
With reference to the fourth aspect or any one of possible implementation manners of the fourth aspect, the transmission power of the feedback channel satisfies the following formula:
P 2 ＝f 7 (M 2 +M 3 )+min{P CMAX ,f 8 (M 2 +M 3 )+P O +α×PL+Δ}
wherein the P is 2 For the transmit power of the feedback channel, the P CMAX For the maximum transmit power, f 7 (M 2 +M 3 ) And said f 8 (M 2 +M 3 ) The bandwidths M of the control channels respectively 2 Bandwidth M of the feedback channel 3 And a function of the power difference of the feedback channel and the control channel, the P O And for the target received power of the second terminal equipment, the PL is a path loss estimated value, and the delta is the second adjustment parameter.
In a fifth aspect, embodiments of the present application provide a terminal device, where the terminal device is used as a first terminal device, where the first terminal device includes a processor, a memory, and a transceiver, where the processor is coupled to the memory, and the processor is configured to determine a transmit power of a data channel; the data channel comprises first information, wherein the first information comprises feedback information; the transceiver is coupled to the processor and is configured to transmit the feedback information to a second terminal device at a transmit power of the data channel.
With reference to the fifth aspect, in one possible implementation manner, the transmission power of the data channel is determined according to the maximum transmission power, the bandwidth of the data channel and the first adjustment parameter; or, the transmitting power of the data channel is determined according to the maximum transmitting power, the bandwidth of the data channel, the bandwidth of the control channel and the first adjustment parameter.
With reference to the fifth aspect or any one of possible implementation manners of the fifth aspect, the first adjustment parameter is determined according to a first sub-parameter and a second sub-parameter, where the first sub-parameter is a parameter related to adjusting a coding strategy MCS, and the second sub-parameter is a parameter related to a number of resource elements REs and a size of a coding block of the data channel, or the second sub-parameter is a parameter related to a number of REs of the data channel and a bit number of the feedback information.
With reference to the fifth aspect or any one of possible implementation manners of the fifth aspect, the first adjustment parameter is determined according to a first sub-parameter, a second sub-parameter and a third sub-parameter, where the first sub-parameter is a parameter related to adjusting an encoding policy MCS, the second sub-parameter is a parameter related to a number of resource units REs of the data channel and a size of an encoding block, or the second sub-parameter is a parameter related to a number of REs of the data channel and a number of bits of the feedback information, and the third sub-parameter is an offset parameter related to a number of bits of the feedback information.
With reference to the fifth aspect or any one of possible implementation manners of the fifth aspect, the feedback information includes hybrid automatic repeat request HARQ information, or the feedback information includes reference information, or the feedback information includes the HARQ information and the reference information; wherein the reference information comprises information between the first terminal device and the second terminal device and/or information between the first terminal device and a network device.
With reference to the fifth aspect or any one of the possible implementation manners of the fifth aspect, the reference information includes one or more of reference status information between the first terminal device and the second terminal device, reference signal received power, reference signal received quality, and path loss information between the first terminal device and the second terminal device.
With reference to the fifth aspect or any one of possible implementation manners of the fifth aspect, a transmission power of the data channel satisfies the following formula:
P 1 ＝min{P CMAX ,f 1 (M 1 )+P O +α×PL+β}
wherein the P is 1 For the transmission power of the data channel, the P CMAX For the maximum transmit power, f 1 (M 1 ) For the bandwidth M of the data channel 1 Is a function of said P O And for the target received power of the second terminal equipment, the PL is a path loss estimated value, and the beta is the first adjustment parameter.
With reference to the fifth aspect or any one of possible implementation manners of the fifth aspect, a transmission power of the data channel satisfies the following formula:
P 1 ＝f 2 (M 1 +M 2 )+min{P CMAX ,f 3 (M 1 +M 2 )+P O +α×PL+β}
wherein the P is 1 For the transmission power of the data channel, the P CMAX For the maximum transmit power, f 2 (M 1 +M 2 ) And said f 3 (M 1 +M 2 ) The bandwidths M of the data channels respectively 1 And the bandwidth M of the control channel 2 Is a function of said P O And for the target received power of the second terminal equipment, the PL is a path loss estimated value, and the beta is the first adjustment parameter.
With reference to the fifth aspect or any one of possible implementation manners of the fifth aspect, a transmission power of the data channel satisfies the following formula:
P 1 ＝min{P CMAX -f 4 (M 1 +M 2 ),f 3 (M 1 +M 2 )+P O +α×PL+β}
wherein the P is 1 For the transmission power of the data channel, the P CMAX For the maximum transmit power, f 3 (M 1 +M 2 ) And said f 4 (M 1 +M 2 ) The bandwidths M of the data channels respectively 1 And the bandwidth M of the control channel 2 Is a function of said P O And for the target received power of the second terminal equipment, the PL is a path loss estimated value, and the beta is the first adjustment parameter.
In a sixth aspect, embodiments of the present application further provide a terminal device, where the terminal device is used as a first terminal device, and the first terminal device includes a processor, a memory, and a transceiver, where the processor is coupled to the memory, and the processor is configured to determine a transmit power of a feedback channel; wherein the feedback channel and the data channel have time domain overlapping and frequency domain overlapping, or the feedback channel and the data channel have frequency domain overlapping and no time domain overlapping, or the feedback channel and the data channel have time domain overlapping and no frequency domain overlapping; the transceiver is coupled to the processor and is configured to transmit feedback information to a second terminal device at a transmit power of the feedback channel.
With reference to the sixth aspect, in one possible implementation manner, the transmission power of the feedback channel is determined according to a maximum transmission power, a bandwidth of the feedback channel, a bandwidth of the data channel, a power difference between the feedback channel and the data channel, and a second adjustment parameter; or, the transmitting power of the feedback channel is determined according to the maximum transmitting power, the bandwidth of the feedback channel, the bandwidth of the control channel, the power difference between the feedback channel and the control channel and the second adjustment parameter.
With reference to the sixth aspect or any one of the possible implementation manners of the sixth aspect, the second adjustment parameter is configured by higher layer signaling, or the second adjustment parameter is predefined.
With reference to the sixth aspect or any one of the possible implementation manners of the sixth aspect, the second adjustment parameter is related to a number of bits of the feedback information and a number of resource elements REs of the feedback channel.
With reference to the sixth aspect or any one of the possible implementation manners of the sixth aspect, a power difference between the feedback channel and the data channel is predefined, or the power difference between the feedback channel and the data channel is indicated by control information; or, the power difference between the feedback channel and the data channel is configured by high-layer signaling; the power difference between the feedback channel and the control channel is predefined, or the power difference between the feedback channel and the control channel is indicated by the control information; alternatively, the power difference between the feedback channel and the control channel is configured by the higher layer signaling.
With reference to the sixth aspect or any one of possible implementation manners of the sixth aspect, the feedback information includes hybrid automatic repeat request HARQ information, or the feedback information includes reference information, or the feedback information includes the HARQ information and the reference information; wherein the reference information comprises information between the first terminal device and the second terminal device and/or information between the first terminal device and a network device.
With reference to the sixth aspect or any one of the possible implementation manners of the sixth aspect, the reference information includes one or more of reference status information between the first terminal device and the second terminal device, reference signal received power, reference signal received quality, and path loss information between the first terminal device and the second terminal device.
With reference to the sixth aspect or any one of possible implementation manners of the sixth aspect, a transmission power of the feedback channel satisfies the following formula:
P 2 ＝f 5 (M 1 +M 3 )+min{P CMAX ,f 6 (M 1 +M 3 )+P O +α×PL+Δ}
wherein the P is 2 For the transmit power of the feedback channel, the P CMAX For the maximum transmit power, f 5 (M 1 +M 3 ) And said f 6 (M 1 +M 3 ) The bandwidths M of the data channels respectively 1 Bandwidth M of the feedback channel 3 And a function of the power difference of the feedback channel and the data channel, the P O And for the target received power of the second terminal equipment, the PL is a path loss estimated value, and the delta is the second adjustment parameter.
With reference to the sixth aspect or any one of possible implementation manners of the sixth aspect, a transmission power of the feedback channel satisfies the following formula:
P 2 ＝f 7 (M 2 +M 3 )+min{P CMAX ,f 8 (M 2 +M 3 )+P O +α×PL+Δ}
wherein the P is 2 For the transmit power of the feedback channel, the P CMAX For the maximum transmit power, f 7 (M 2 +M 3 ) And said f 8 (M 2 +M 3 ) The bandwidths M of the control channels respectively 2 Bandwidth M of the feedback channel 3 And a function of the power difference of the feedback channel and the control channel, the P O And for the target received power of the second terminal equipment, the PL is a path loss estimated value, and the delta is the second adjustment parameter.
In a seventh aspect, embodiments of the present application provide a computer-readable storage medium having instructions stored therein, which when run on a computer, cause the computer to perform the methods of the above aspects.
In an eighth aspect, embodiments of the present application provide a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of the above aspects.
Drawings
FIG. 1a is a schematic diagram of a communication system provided in an embodiment of the present application;
fig. 1b is a schematic view of a V2X scenario provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram of a time-frequency resource according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a frame structure according to an embodiment of the present application;
fig. 4a is a schematic view of a side uplink scenario provided in an embodiment of the present application;
FIG. 4b is a schematic diagram of another side-link scenario provided by an embodiment of the present application;
FIG. 4c is a schematic illustration of a scenario of yet another side-link provided by an embodiment of the present application;
FIG. 4d is a schematic illustration of a scenario of yet another side-link provided by an embodiment of the present application;
FIG. 4e is a schematic diagram of a scenario of yet another side-link provided by an embodiment of the present application;
FIG. 4f is a schematic illustration of a scenario of yet another side-link provided by an embodiment of the present application;
FIG. 4g is a schematic diagram of a scenario of yet another side-link provided by an embodiment of the present application;
fig. 5 is a schematic flow chart of a power control method according to an embodiment of the present application;
fig. 6 is a schematic flow chart of another power control method according to an embodiment of the present application;
FIG. 7 is a schematic diagram of another frame structure provided in an embodiment of the present application;
FIG. 8 is a schematic diagram of yet another frame structure provided by an embodiment of the present application;
FIG. 9 is a schematic diagram of yet another frame structure provided by an embodiment of the present application;
fig. 10 is a schematic structural diagram of a power control device according to an embodiment of the present application;
fig. 11 is a schematic structural diagram of a terminal device according to an embodiment of the present application.
Detailed Description
Embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.
The terms first and second and the like in the description, in the claims and in the drawings, are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.
It should be understood that, in the present application, "at least one (item)" means one or more, "a plurality" means two or more, "at least two (items)" means two or three and three or more, "and/or" for describing an association relationship of an association object, three kinds of relationships may exist, for example, "a and/or B" may mean: only a, only B and both a and B are present, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b or c may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.
A communication system as used herein may be understood as a wireless cellular communication system or as a wireless communication system based on a cellular network architecture. Such as a fifth generation mobile communication (5 th-generation, 5G) system, a next generation mobile communication, and so on. Fig. 1a is a schematic diagram of a communication system according to an embodiment of the present application, and the solution in the present application is applicable to the communication system. The communication system may comprise at least one network device, only one of which is shown, as next generation base stations (the next generation Node B, gNB) in the figure; and one or more terminal devices connected to the network device, such as terminal device 1 and terminal device 2 in the figure.
Wherein the network device may be a device capable of communicating with the terminal device. The network device may be any device having wireless transceiver capabilities including, but not limited to, a base station. For example, the base station may be a gNB, or the base station may be a base station in a future communication system. Optionally, the network device may also be an access node, a wireless relay node, a wireless backhaul node, etc. in a wireless local area network (wireless fidelity, wiFi) system. Optionally, the network device may also be a wireless controller in a cloud wireless access network (cloud radio access network, CRAN) scenario. Optionally, the network device may also be a wearable device or an in-vehicle device, etc. Optionally, the network device may also be a small station, a transmitting node (transmission reference point, TRP), etc. Of course, the present application is not limited thereto.
A terminal device, which may also be referred to as a User Equipment (UE), a terminal, etc. The terminal equipment is equipment with a wireless receiving and transmitting function, can be deployed on land, and comprises indoor or outdoor, handheld, wearable or vehicle-mounted; the device can also be deployed on the water surface, such as a ship, etc.; but may also be deployed in the air, for example on an aircraft, balloon or satellite, etc. The terminal device may be a mobile phone, a tablet (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an augmented reality (augmented reality, AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned driving (self driving), a wireless terminal in remote medical (remote medium), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation security (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), or the like.
It will be appreciated that in the communication system shown in fig. 1a, the terminal device 1 and the terminal device 2 may also communicate via a device-to-device (D2D) technology or a vehicle-to-anything (V2X) technology.
Further, V2X specifically includes vehicle-to-vehicle (V2V), vehicle-to-person (V2P), vehicle-to-infrastructure (vehicle to infrastructure, V2I), vehicle-to-network (vehicle to network, V2N). As shown in fig. 1b, fig. 1b shows a scenario of V2X. Wherein V2V refers to LTE-based inter-vehicle communication; V2P refers to LTE-based vehicle-to-person (including pedestrians, cyclists, drivers, or passengers) communication; V2I refers to communication of LTE-based vehicles with Road Side Units (RSUs), and yet another V2N may be included in V2I, V2N refers to communication of LTE-based vehicles with base stations/networks. Among them, roadside devices include two types: the terminal type RSU is in a non-moving state because the terminal type RSU is distributed at the roadside, and mobility does not need to be considered; the base station type RSU may provide timing synchronization and resource scheduling for vehicles with which it communicates.
As an example, referring to fig. 2, fig. 2 is a schematic structural diagram of a time-frequency resource provided by an embodiment of the present application, where a Resource Element (RE) is an orthogonal frequency division multiplexing ((orthogonal frequency division multiplexing, OFDM) symbol in the time domain and a subcarrier in the frequency domain, in an LTE system, the time-frequency resource is divided into an OFDM or single carrier frequency division multiplexing multiple access (single carrier frequency division multiplexing access, SC-FDMA) symbol in the time domain and a subcarrier in the frequency domain, and the minimum resource granularity is called RE, that is, a time-frequency lattice point representing a time-domain symbol in the time domain and a subcarrier in the frequency domain, it is understood that the above is only an example provided by an embodiment of the present application, and in future communication technology, the structure of the RE may change, and therefore, the RE shown in fig. 2 should not be understood as limiting the embodiment of the present application, as in 5G NR, multiple subcarrier spacing is introduced, as the subcarrier spacing may be 15khz 2 n N is an integer from 3.75,7.5 up to 480kHz, etc.
In the LTE system of 3GPP, the main traffic types in LTE V2X are broadcast, and there is no hybrid automatic repeat request (hybrid automatic repeat request, HARQ) feedback, channel state information (channel state information, CSI) feedback, etc. However, the traffic types in NR V2X also include unicast and multicast, and also HARQ feedback, and use separate physical side-link feedback channels (physical sidelink feedback channel, PSFCH) to carry side-link feedback control information (sidelink feedback control information, SFCI).
Specifically, as shown in the frame structure of fig. 3, as shown in fig. 3a and 3b, the physical side uplink control channel (physical sidelink control channel, PSCCH) and the physical side uplink shared channel (physical sidelink shared channel, PSSCH) are time division multiplexed (time division duplexing, TDM). In LTE, in the frame structures shown in fig. 3a and 3b, the transmission powers of PSCCH and PSSCH satisfy the following formulas:
P PSSCH ＝min{P CMAX,PSSCH ,10log 10 (M PSSCH )+P O_PSSCH,2 +α PSSCH,2 ×PL} (1)
P PSCCH ＝min{P CMAX,PSCCH ,10log 10 (M PSCCH )+P O_PSCCH,2 +α PSCCH,2 ×PL} (2)
wherein P is PSSCH For PSSCH transmit power, P CMAX,PSSCH For the maximum transmission power of the PSSCH, M PSSCH P for the bandwidth of the PSSCH O_PSSCH,2 For target received power of terminal equipment, alpha PSSCH,2 The PL is the path loss between the base station and the terminal equipment, the filtering parameters configured for the base station.
Wherein P is PSCCH For PSCCH transmit power, P CMAX,PSCCH For the maximum transmit power of the PSCCH, M PSCCH For the bandwidth of the PSCCH, P O_PSCCH,2 For target received power of terminal equipment, alpha PSCCH,2 The PL is the path loss between the base station and the terminal equipment, the filtering parameters configured for the base station.
As shown in fig. 3c, PSCCH and PSSCH are frequency division multiplexed (frequency division duplexing, FDM). In LTE, in the frame structure shown in 3c in fig. 3, the transmission powers of PSCCH and PSCCH may satisfy the following formulas, respectively:
Figure BDA0001965151310000111
alternatively, the following modifications can be made to equation (3):
Figure BDA0001965151310000112
Figure BDA0001965151310000113
alternatively, the following modifications can be made to equation (5):
Figure BDA0001965151310000114
wherein P is PSSCH For PSSCH transmit power, P PSCCH Transmit power for PSCCH; m is M PSSCH For PSSCH bandwidth, M PSCCH Bandwidth for PSCCH; p (P) CMAX The maximum transmission power of the terminal device is also understood to be the maximum transmission power allowed by the terminal device. PL is the downlink loss of a terminal device, and in a communication system, particularly a time division duplex (time division duplexing, TDD) system, it is generally considered that the uplink and downlink losses are uniform, so PL can be used to represent the possible link loss of a terminal device to the base station side. P (P) O_PSSCH_3 The power expected to be received for the terminal device (also understood as the target received power of the terminal device), wherein 3 denotes the base station schedule. Alpha PSSCH,3 And (5) the filtering parameters configured in the base station scheduling mode.
As shown by 3d in fig. 3, there is both time domain overlap and frequency domain overlap between PSCCH and PSSCH.
Based on the frame structure shown in fig. 3, in NR V2X, PSFCH may also use different multiplexing modes with PSCCH and PSSCH, so the present application provides a power control method, which can effectively solve the problem of power control between PSFCH and PSCCH and PSSCH. In particular, reference may be made to the power control methods shown in fig. 5 and 6.
The communication scenario of the power control method provided in the embodiment of the present application will be specifically described below taking the terminal device 1 and the terminal device 2 in NR-V2X as an example.
As shown in fig. 4a to fig. 4g, schematic diagrams of a scenario of a side link (sidelink) communication according to an embodiment of the present application are shown.
In the scenario shown in fig. 4a both terminal device 1 and terminal device 2 are outside the cell coverage.
In the scenario shown in fig. 4b, the terminal device 1 is in the cell coverage and the terminal device 2 is outside the cell coverage.
In the scenario shown in fig. 4c, both terminal device 1 and terminal device 2 are within the coverage of the same cell and in a public land mobile network (public land mobile network, PLMN), like PLMN1.
In the scenario shown in fig. 4d, terminal device 1 and terminal device 2 are in one PLMN, e.g. PLMN1, but in different cell coverage areas.
In the scenario shown in fig. 4e, the terminal device 1 and the terminal device 2 are respectively in different PLMNs, different cells, and the terminal device 1 and the terminal device 2 are respectively in the common coverage of the two cells. Such as terminal device 1 in PLMN1 and terminal device 2 in PLMN 2.
In the scenario shown in fig. 4f, the terminal device 1 and the terminal device 2 are respectively in different PLMNs and different cells, and the terminal device 1 is in the common coverage of the two cells, and the terminal device 2 is in the coverage of the serving cell.
In the scenario shown in fig. 4g, the terminal device 1 and the terminal device 2 are respectively located in different PLMNs, different cells, and the terminal device 1 and the terminal device 2 are respectively located in the coverage areas of the respective serving cells.
It is understood that the scenario shown above may be applicable to vehicle-to-everything (V2X), which may also be referred to as V2X.
Referring to fig. 5, fig. 5 is a flowchart of a power control method according to an embodiment of the present application, where the power control method may be applied to the terminal devices shown in fig. 4a to 4g, and the power control method may further effectively solve the power control problem shown in fig. 3, and as shown in fig. 5, the power control method includes:
501. The method comprises the steps that a first terminal device determines the transmitting power of a data channel; wherein the data channel includes first information, and the first information includes feedback information.
In this embodiment of the present application, the feedback information may be sent along with the data channel, for example, the feedback information may be transmitted in the data channel in a puncturing or rate matching manner. Specifically, the feedback information may include HARQ information including Acknowledgement (ACK) or negative acknowledgement (negative acknowledgement, NACK) for feeding back successfully received data, and NACK for feeding back unsuccessfully received data. Optionally, the feedback information may further include reference information, where the reference information may include information between the first terminal device and the second terminal device, or the reference information may include information between the first terminal device and the network device, or the reference information may further include information between the first terminal device and the second terminal device, and information between the first terminal device and the network device. Specifically, the reference information may include any one or more of the following: reference state information such as channel state information (channel state information, CSI) between the first terminal device and the second terminal device; path loss information between the first terminal device and the second terminal device; reference signal received power (reference signal received power, RSRP); reference signal received quality (reference signal received quality, RSRQ). Of course, the above is only an example, as the reference information may also include information related to a distance, which may be understood as a distance between the first terminal device and the base station, or a distance between the first terminal device and the second terminal device, or a communication distance that the first terminal device may cover, or feedback that the first terminal device is within the coverage of the base station.
Alternatively, the feedback information may further include both HARQ information and reference information, and the embodiment of the present application does not uniquely define which information is specifically included in the feedback information.
It is understood that in the embodiments of the present application, the data channel may be understood as a channel for carrying first information, where the first information may include feedback information, and the specific description of the feedback information may refer to the foregoing embodiments, which are not described in detail herein. It is understood that the feedback information may be specifically referred to as side-uplink feedback control information (sidelink feedback control information, SFCI) or the like, and the name of the feedback information is not limited uniquely by the embodiments of the present application. Further, the first information may further include data, i.e. the data channel may be understood as a channel for carrying data, e.g. the data may be data sent by the first terminal device to the second terminal device, and further, the data may be used for carrying service data sent by the first terminal device to the second terminal device. For example, in the sidelink, the data channel may be a physical sidelink shared channel (physical sidelink shared channel, PSSCH).
It will be appreciated that as for the specific method for the first terminal device to determine the transmit power of the data channel, reference may be made to the following implementation, which will not be described in detail here.
502. And the first terminal equipment sends the feedback information to the second terminal equipment by using the transmitting power of the data channel, and the second terminal equipment receives the feedback information from the first terminal equipment.
In this embodiment of the present application, the first terminal device may carry feedback information in a data channel in a hole punching manner, or the first terminal device may also carry feedback information in a data channel in a rate matching manner, so as to send feedback information through the data channel.
In the embodiment of the application, when the time-frequency domain resource of the data channel is overlapped with that of the feedback channel, the feedback information can be sent along with the data channel, so that the embodiment of the application improves the transmitting power of the data channel, and the transmitting power of the data channel under the condition is more accurately distributed.
Based on the method shown in fig. 5, it will be explained in detail how the first terminal device determines the transmit power of the data channel. It will be appreciated that the method of determining the transmit power of the data channel by the first terminal device will be described below taking the data channel as the PSSCH as an example.
In some embodiments of the present application, the transmit power of the data channel may be determined according to the maximum transmit power, the bandwidth of the data channel, and the first adjustment parameter.
As in 3a and 3b of fig. 3, in this case, the transmit power of the PSSCH may satisfy the following formula:
P 1 ＝min{P CMAX ,f 1 (M 1 )+P O +α×PL+β} (7)
wherein P is 1 For the transmission power of the data channel, P CMAX For maximum transmit power, f 1 (M 1 ) Bandwidth M for data channel 1 Function, P of O For the target received power of the second terminal device (which may also be understood as the received power expected by the first terminal device), PL is the path loss estimate, the compensation parameter for the alpha path loss may be configured by higher layer signaling, and beta is the first adjustment parameter. Specifically, P CMAX It may be understood as a maximum transmit power limited by the physical hardware or, alternatively, as a maximum transmit power allowed by the hardware of the terminal device. Specifically, β may be understood as HARQ, reference information, or a parameter related to the number of bits of HARQ and reference information that feedback information follows for PSSCH transmission. Specifically, the PL may be a path loss estimated value between the first terminal device and the base station, or may be a path loss estimated value between the first terminal device and the second terminal device, which is not limited uniquely in the embodiment of the present application. Alternatively, the PL may be predefined, e.g. if the first terminal device is within the coverage area of the base station, the PL may be a path loss estimate between the first terminal device and the base station; and if the first terminal device is outside the coverage area of the base station, the PL may be a path loss estimate between the first terminal device and the second terminal device. Alternatively, the PL may be configured by higher layer signaling or physical layer signaling, etc., with particular reference to the PL in the embodiments of the present application The values are not limited.
It is understood that in the embodiments of the present application, the higher layer signaling may include radio resource control (radio resource control, RRC) signaling, medium access layer control element (medium access control control element, MAC CE) signaling, and system information block (system information block, SIB) signaling, and the like, and the embodiments of the present application are not limited to which of the higher layer signaling is specific. Alternatively, the higher layer signaling may be higher layer signaling under Uu link, higher layer signaling under side uplink, or higher layer signaling under other links in the future, etc., which is not limited in the embodiments of the present application.
Specifically, in the case where the feedback information is SFCI, the transmit power of the PSSCH may satisfy the following formula:
P PSSCH ＝min{P CMAX ,10log 10 (M PSSCH )+P O +α×PL+β SFCI } (8)
in some embodiments, for equation (7) and equation (8), the first adjustment parameter β or β SFCI The determination may be made based on a first sub-parameter Ks, which is a parameter related to adjusting a coding strategy (modulation and coding scheme, MCS), and a second sub-parameter BPRE (bits per resource element), which is a parameter related to the number of Resource Elements (REs) of the data channel and the size of the coding block, or a parameter related to the number of REs of the data channel and the number of bits of the feedback information. It will be appreciated that reference is made to the foregoing embodiments for a specific description of other parameters in equation (8), and will not be described in detail here.
Specifically, the first adjustment parameter may satisfy the following formula:
β SFCI ＝10log10(2 BPRE×Ks -1) (9)
the first sub-parameter Ks is an adjustment parameter related to MCS, and the first sub-parameter may be indicated by higher layer signaling, such as radio resource control (radio resource control, RRC) signaling, etc., which is not limited in the embodiments of the present application. For the second sub-parameter BPRE, the following formula may be satisfied:
Figure BDA0001965151310000141
wherein Kr is the size of Code Block (CB), r is the code block index, C is the total code block number, N RE The number of REs for the PSSCH. That is, the second sub-parameter is a parameter related to the number of REs occupied by the data channel and the size of the encoded block.
Alternatively, for the second sub-parameter BPRE, the following formula may be satisfied:
Figure BDA0001965151310000142
wherein O is CSI For the feedback information, such as the bit number of CSI, the OCSI may also be optionally the sum of the bit number of the feedback information, such as CSI, and the bit number of the cyclic redundancy check (cyclic redundancy check, CRC). N (N) RE The number of REs for the PSSCH. That is, the second sub-parameter may also be a parameter related to the number of REs occupied by the data channel and the number of bits of the feedback information.
It is understood that the second sub-parameter shown in equation (10) can also be understood as a parameter when feedback information and data are simultaneously transmitted in a data channel. The second sub-parameter shown in equation (11) can be understood as a parameter when only feedback information is transmitted in the data channel.
It will be appreciated that the second sub-parameters shown in equation (10) and equation (11) are only one example, and in particular implementations, any variations may also be made according to equation (10) and equation (11), and thus should not be construed as limiting embodiments of the present application.
In some embodiments, for equation (7) and equation (8), the first adjustment parameter β or β SFCI Can also be based on the first sub-parameter Ks, the second sub-parameter BPRE and the third sub-parameter SFCI offset Determining that the first sub-parameter is a parameter related to adjusting the coding strategy MCS, the second sub-parameter is a parameter related to the number of resource elements RE of the data channel and the size of the coding block, or the second sub-parameter is a parameter related to the dataThe number of REs of the channel and the number of bits of the feedback information, and the third sub-parameter is an offset parameter related to the number of bits of the feedback information.
Specifically, the first adjustment parameter may satisfy the following formula:
β SFCI ＝10log10[(2 BPRE×Ks -1)×SFCI offset ] (12)
the first sub-parameter Ks is an adjustment parameter related to MCS, and the first sub-parameter may be indicated by higher layer signaling, such as radio resource control (radio resource control, RRC) signaling, etc., which is not limited in the embodiments of the present application. For the second sub-parameter BPRE, reference may be made to the specific descriptions of equation (10) and equation (11), which will not be described in detail here.
Wherein for the third sub-parameter SFCI offset When the feedback information and the data are simultaneously transmitted in the data channel, the value of the third sub-parameter may be 1. When only feedback information is transmitted in the data channel, the third sub-parameter may be an offset parameter related to the number of bits of the feedback information, for example, the more the number of bits of the feedback information, the larger the value of the third sub-parameter, or the function corresponding to the number of bits of the feedback information changes, and the change trend of the third sub-parameter may be the same as or opposite to the function corresponding to the number of bits of the feedback information.
In some embodiments of the present application, the transmit power of the data channel is determined based on the maximum transmit power, the bandwidth of the data channel, the bandwidth of the control channel, and the first adjustment parameter.
In some embodiments, as in 3c in fig. 3, the transmit power of the data channel satisfies the following equation:
P 1 ＝f 2 (M 1 +M 2 )+min{P CMAX ,f 3 (M 1 +M 2 )+P O +α×PL+β} (13)
wherein P is 1 For the transmission power of the data channel, P CMAX For maximum transmit power, f 2 (M 1 +M 2 ) And f 3 (M 1 +M 2 ) Bandwidth M of data channels respectively 1 And control channelBandwidth M 2 Function, P of O For the target received power of the second terminal device, PL is the estimated value of the path loss, the compensation parameter of the alpha path loss can be configured by the higher layer signaling, and beta is the first adjustment parameter. Specifically, P CMAX It may be understood as a maximum transmit power limited by the physical hardware or, alternatively, as a maximum transmit power allowed by the hardware of the terminal device. Specifically, β may be understood as HARQ, reference information, or a parameter related to the number of bits of HARQ and reference information that feedback information follows for PSSCH transmission. It will be appreciated that specific descriptions of PL are referred to the description of equation (7), and will not be described in detail here.
Specifically, the transmit power of the PSSCH may satisfy the following formula:
Figure BDA0001965151310000151
alternatively, equation (14) may be modified as follows:
Figure BDA0001965151310000152
wherein P is SSCH For the transmit power of the data channel, M PSSCH Bandwidth of data channel, M PSCCH Is the bandwidth of the control channel. It is understood that the description of other parameters in the formula may refer to the description of the foregoing formula, and will not be repeated here.
Specifically, as can be seen from comparing equation (14) with equation (15), f in equation (13) 2 (M 1 +M 2 ) And f 3 (M 1 +M 2 ) The following formulas may be satisfied, respectively:
Figure BDA0001965151310000153
Figure BDA0001965151310000154
it will be appreciated that for the first adjustment parameter β or β in equation (13), equation (14) and equation (15) SFCI Reference may be made to the specific description of the foregoing examples, such as the specific description of equation (9), equation (10), equation (11) and equation (12), which will not be described in detail herein.
In some embodiments, as 3d in fig. 3, the transmit power of the data channel satisfies the following equation in this case:
P 1 ＝min{P CMAX -f 4 (M 1 +M 2 ),f 3 (M 1 +M 2 )+P O +α×PL+β} (18)
Wherein P is 1 For the transmission power of the data channel, P CMAX For maximum transmit power, f 3 (M 1 +M 2 ) And f 4 (M 1 +M 2 ) Bandwidth M of data channels respectively 1 And bandwidth M of control channel 2 Function, P of O For the target received power of the second terminal device, PL is the estimated value of the path loss between the first terminal device and the second terminal device, and β is the first adjustment parameter.
Specifically, the transmit power of the PSSCH may satisfy the following formula:
Figure BDA0001965151310000161
wherein P is PSSCH_actual The PSSCH is the actual transmitting power, namely the PSSCH actual transmitting power determined according to the using condition of the power; p (P) PSCCH For a bandwidth of M PSSCH In the case of PSSCH, the transmit power of the PSSCH. For example, for 3d of FIG. 3, M PSSCH I.e. no PSCCH is included in 3d of fig. 3, the transmit power of the PSCCH, i.e. M PSSCH I.e., the entire bandwidth of the PSCCH, is not limited to the bandwidth after the removal of the PSCCH bandwidth. For example, the bandwidth may be as represented by the arrows shown in the figures. That is, the bandwidth is understood to be the bandwidth when the PSCCH is not included in the figure. It is understood that M in other formulas in embodiments of the present application PSSCH Represented byThe meaning is not described in detail.
Specifically, f 3 (M 1 +M 2 ) The satisfied formula may refer to formula (17).
f 4 (M 1 +M 2 ) The following formulas may be satisfied, respectively:
Figure BDA0001965151310000162
it will be appreciated that for the first tuning parameter β or β in equation (18) and equation (19) SFCI Reference may be made to the specific description of the foregoing examples, such as the specific description of equation (9), equation (10), equation (11) and equation (12), which will not be described in detail herein.
It will be appreciated that there may be other variations of the various formulas shown above, etc., and therefore the formulas shown in the embodiments of the present application should not be construed as limiting the embodiments of the present application.
Referring to fig. 6, fig. 6 is a flowchart of another power control method according to an embodiment of the present application, where the power control method may be applied to the terminal device shown in fig. 4a to 4g, and the power control method may further effectively solve the power control problem shown in fig. 3, and as shown in fig. 6, the power control method includes:
601. the first terminal equipment determines the transmitting power of a feedback channel; wherein the feedback channel overlaps with the data channel in both time and frequency domains, or the feedback channel overlaps with the data channel in both frequency and time domains, or the feedback channel overlaps with the data channel in both time and frequency domains.
In the embodiment of the application, the feedback channel exists separately, and the feedback channel can be used for carrying feedback information. In this case, the frame structure relationship between the data channel and the feedback channel can refer to the structures shown in fig. 7 to 9. As shown in fig. 7, when the data channel and the control channel belong to a time division multiplexing relationship, that is, when the data channel and the control channel have frequency domain overlapping, there is both time domain overlapping and frequency domain overlapping between the feedback channel and the data channel. As shown in fig. 8, when the data channel and the control channel have both time domain overlap and frequency domain overlap, the feedback channel and the data channel have both time domain overlap and frequency domain overlap, and the feedback channel and the control channel have different relations. As shown in fig. 9, when the data channel and the control channel belong to a frequency division multiplexing relationship, that is, when the data channel and the control channel have time domain overlapping, the feedback channel and the data channel have frequency domain overlapping, and belong to a time division multiplexing relationship.
Accordingly, the embodiments of the present application will focus on determining the transmit power of the feedback channel according to the frame structures shown in fig. 7 to 9, and the detailed description will refer to the following embodiments, which will not be described in detail here.
602. And the first terminal equipment sends feedback information to the second terminal equipment by using the transmitting power of the feedback channel, and the second terminal equipment receives the feedback information from the first terminal equipment.
In this embodiment of the present application, the feedback information may include HARQ information, where the HARQ information includes Acknowledgement (ACK) or negative acknowledgement (negative acknowledgement, NACK), and the ACK is used to feed back successfully received data, and the NACK is used to feed back unsuccessfully received data. Optionally, the feedback information may further include reference information, where the reference information may include information between the first terminal device and the second terminal device, or the reference information may include information between the first terminal device and the network device, or the reference information may further include information between the first terminal device and the second terminal device, and information between the first terminal device and the network device. Specifically, the reference information may include any one or more of the following: reference state information such as channel state information (channel state information, CSI) between the first terminal device and the second terminal device; path loss information between the first terminal device and the second terminal device; reference signal received power (reference signal received power, RSRP); reference signal received quality (reference signal received quality, RSRQ). Of course, the above is only an example, as the reference information may also include information related to a distance, which may be understood as a distance between the first terminal device and the base station, or a distance between the first terminal device and the second terminal device, or a communication distance that the first terminal device may cover, or feedback that the first terminal device is within the coverage of the base station.
Alternatively, the feedback information may further include both HARQ information and reference information, and the embodiment of the present application does not uniquely define which information is specifically included in the feedback information.
It is understood that in the embodiments of the present application, a control channel may be understood as a channel for carrying side uplink control information (sidelink control information, SCI), which may include decoding information of data transmitted in a data channel, etc. For example, in the sidelink, the control channel may be a physical sidelink control channel (physical sidelink control channel, PSCCH).
In this embodiment of the present application, the multiplexing manner between the feedback channel and the data channel may include multiple possibilities (i.e., different frame structures), for example, the feedback channel may have time domain overlapping and frequency domain overlapping with the data channel, for example, the feedback channel may have frequency domain overlapping and no time domain overlapping with the data channel, and for example, the feedback channel may have time domain overlapping and no frequency domain overlapping with the data channel, where different multiplexing manners correspond to different transmission powers, so that the terminal device may determine the transmission power of the feedback channel according to one of multiple possibilities, and avoid determining the transmission power of the feedback channel by adopting one manner under all conditions, thereby effectively improving accuracy of determining the transmission power of the feedback channel and reasonably controlling the transmission power of the feedback channel.
Based on the method shown in fig. 6, it will be described in detail how the first terminal device determines the transmit power of the feedback channel. It will be appreciated that the method for determining the transmit power of the feedback channel by the first terminal device will be described below taking as an example the data channel as PSSCH, the control channel as PSCCH and the feedback channel as PSFCH.
In some embodiments of the present application, the transmit power of the feedback channel is determined according to the maximum transmit power, the bandwidth of the feedback channel, the bandwidth of the data channel, the power difference between the feedback channel and the data channel, and the second adjustment parameter.
As shown in fig. 7a and 7b, in the case where the PSCCH and the PSSCH employ TDM, the PSFCH and the PSSCH have both time domain overlapping and frequency domain overlapping, that is, the data channel and the feedback channel are in an embedded multiplexing mode, and the feedback channel includes the time-frequency domain resource of the feedback channel in the area of the data channel, that is, the time-frequency domain resource of the data channel. In this case, the transmission power of the feedback channel satisfies the following formula:
P 2 ＝f 5 (M 1 +M 3 )+min{P CMAX ,f 6 (M 1 +M 3 )+P O +α×PL+Δ} (21)
wherein P is 2 For the transmit power of the feedback channel, P CMAX For maximum transmit power, f 5 (M 1 +M 3 ) And f 6 (M 1 +M 3 ) Bandwidth M of data channels respectively 1 Bandwidth M of feedback channel 3 And a function of the power difference (not shown in the formula) of the feedback channel and the data channel, P O For the target received power of the second terminal device, α is a compensation parameter of the path loss, which can be configured by higher layer signaling, PL is a path loss estimation value, and Δ is a second adjustment parameter. Specifically, the PL may be a path loss estimated value between the first terminal device and the base station, or may be a path loss estimated value between the first terminal device and the second terminal device, which is not limited uniquely in the embodiment of the present application. Alternatively, the PL may be predefined, e.g. if the first terminal device is within the coverage area of the base station, the PL may be a path loss estimate between the first terminal device and the base station; and if the first terminal device is outside the coverage area of the base station, the PL may be a path loss estimate between the first terminal device and the second terminal device. Alternatively, the PL may be configured by higher layer signaling or physical layer signaling, and the specific value of the PL is not limited in the embodiments of the present application.
Specifically, the transmit power of the feedback channel may satisfy the following formula:
Figure BDA0001965151310000181
wherein P is PSFCH For the transmitting power of the feedback channel, x is the power difference between the feedback channel and the data channel, M PSFCH For the bandwidth of the feedback channel, M PSSCH Bandwidth of data channel, M PSCCH To control the bandwidth of the channel, delta format Is the second adjustment parameter. Description of other parameters reference may be made to the specific description of equation (21). It is understood that the formula (22) may be further modified according to the modification methods of the formula (3) and the formula (5), and the formula (22) should not be construed as limiting the embodiments of the present application.
Thereby f 5 (M 1 +M 3 ) And f 6 (M 1 +M 3 ) The following formulas may be satisfied, respectively:
Figure BDA0001965151310000182
f 6 (M 1 +M 3 )＝10log 10 (M PSSCH +10 x ×M PSFCH ) (24)
for equation (21) and equation (22), the second adjustment parameter Δ or Δ format May be configured by higher layer signaling or the second adjustment parameter may be predefined.
It is understood that since HARQ, reference information, or both HARQ and reference information may be included in the feedback information, if HARQ is included in the feedback information, the second adjustment parameter may be related to the number of bits of HARQ, if reference information is included in the feedback information, the second adjustment parameter may be related to the number of bits of reference information, and so on. It will be appreciated that for a specific embodiment in which the feedback information includes information, reference may be made to the foregoing embodiments, and no further details will be given here. It is understood that the second adjustment parameter may be related not only to the number of bits of the feedback information, but also to the content included in the feedback information. The value of the second adjustment parameter may also be different for different feedback information, for example. That is, the second adjustment parameter may be related not only to the information included in the feedback information but also to the number of bits of the information included in the feedback information. The second adjustment parameter may be indicated, for example, by higher layer signaling, or may also be predefined by different feedback information or the number of bits of information included in the feedback information.
Optionally, the second adjustment parameter may also be related to the number of bits of the feedback information and the number of resource elements REs of the feedback channel. The second adjustment parameter may satisfy the following formula:
Δ format ＝10log10(2 BPRE×K -1) (25)
where K is a power adjustment factor, for example, different feedback information may correspond to different K, e.g., K may be indicated by higher layer signaling. Wherein bpre=o SFCI /N RE Wherein O is SFCI For feedback information, such as the number of bits of HARQ, as well as the number of bits of reference information CSI, as well as the number of bits of other information included in the reference information, as well as the number of bits of HARQ and CRC, the number of bits of CSI and CRC, etc., N RE Is the number of REs occupied by the PSFCH.
Further, the second adjustment parameter may also be associated with different modes, such as in a base station scheduling mode and a contention mode. Alternatively, the second adjustment parameter may also be different according to different transmission links, e.g. the second adjustment parameter may be different in the link between the base station and the terminal device than in the link between the terminal device and the terminal device. It may be appreciated that the value of the second adjustment parameter may also be independent of a mode, or independent of a transmission link, etc., which is not limited in the embodiments of the present application.
For equations (21) to (24), the power difference x between the feedback channel and the data channel is predefined, or the power difference x between the feedback channel and the data channel is indicated by control information; alternatively, the power difference x between the feedback channel and the data channel is configured by higher layer signaling, and the embodiment of the present application does not limit how this x is set. Specifically, if x is predefined, the x may be associated with a different frame structure, and may be different according to the different frame structures shown in fig. 7 to 9. Another example is x may be dynamically indicated by SCI by 1bit or 2bits, etc. It is understood that the value of x may be positive, negative, or 0.
In the embodiment of the present application, in the frame structure shown in fig. 7, demodulation of the feedback channel may be facilitated by setting a power difference between the feedback channel and the data channel. If the transmitting power of the feedback channel is higher than that of the data channel, the demodulation efficiency and accuracy of the feedback channel can be effectively improved.
It can be understood that, in the frame structure shown in fig. 7, as for the formula that is satisfied by the transmission powers of the data channel and the control channel, reference may be made to the formula shown in fig. 3, and the embodiment of the present application is not limited to the formula or the condition that is satisfied by the transmission powers of the data channel and the control channel shown in fig. 7.
In some embodiments, as shown in 8a of fig. 8, since PSFCH overlaps PSSCH in both time and frequency domains, and has the same frame structure as shown in fig. 7, the formula satisfied by PSFCH in 8a of fig. 8 may refer to the specific implementation of fig. 7, and will not be described in detail here. The power difference between the data channel and the feedback channel in fig. 8a is the same as the power difference between the data channel and the feedback channel in fig. 7, which is not limited in this embodiment. That is, for the same parameter, different values may be taken in different figures.
It will be appreciated that the PSSCH transmit power in 8a of fig. 8 may satisfy the following equation since the PSFCH and the portion of the PSCCH overlapping the PSSCH need to be considered:
Figure BDA0001965151310000191
optionally, the transmit power of the PSSCH may also satisfy the following formula:
Figure BDA0001965151310000192
it will be appreciated that for the specific embodiments of the parameters in equation (26) and equation (27), reference may be made to the foregoingThe embodiments are not described in detail here. As for M in equation (26) and equation (27) PSSCH The bandwidth represents the bandwidth of the entire PSSCH in 8a of fig. 8, i.e., the bandwidth of the PSSCH when the PSCCH and PSFCH are not included in the figure. For example, the bandwidth may be the bandwidth indicated by the arrow in the figure. As another example, P in the formula PSSCH_actual The actual transmit power of the PSSCH, i.e., the actual transmit power of the PSSCH determined according to the use of power, etc.
For 8b in fig. 8, in some embodiments of the present application, the transmit power of the feedback channel may also be determined according to the maximum transmit power, the bandwidth of the feedback channel, the bandwidth of the control channel, the power difference between the feedback channel and the control channel, and the second adjustment parameter.
As shown in 8b of fig. 8, the time-frequency domain resources of the PSFCH overlap with the time-frequency domain resources of the PSSCH, and the PSCCH overlaps with the time-domain resources of the PSFCH, belonging to frequency division multiplexing. Thus, different power boosting can be employed depending on the multiplexing priority rules of PSFCH, PSCCH, and PSSCH, e.g., PSCCH > PSFCH > PSSCH. And because of the multiplexing relationship between the PSFCH and the PSCCH, the power difference y between the PSFCH and the PSCCH can be considered. It will be appreciated that in this case there may also be a power difference x between the PSFCH and the PSSCH, for which reference is made to the previous embodiment, and this will not be described in detail here.
Therefore, the transmit power of the feedback channel satisfies the following formula:
P 2 ＝f 7 (M 2 +M 3 )+min{P CMAX ,f 8 (M 2 +M 3 )+P O +α×PL+Δ} (28)
wherein P is 2 For the transmit power of the feedback channel, P CMAX For maximum transmit power, f 7 (M 2 +M 3 ) And f 8 (M 2 +M 3 ) Bandwidth M of control channels respectively 2 Bandwidth M of feedback channel 3 And a function of the power difference of the feedback channel and the control channel, P O For the target received power of the second terminal device, PL is the path loss estimate and Δ is the second adjustment parameter.
Specifically, the transmit power of the feedback channel may satisfy the following formula:
Figure BDA0001965151310000201
the power difference y between the feedback channel and the control channel is predefined, or the power difference y between the feedback channel and the control channel is indicated by control information; alternatively, the power difference y of the feedback channel and the control channel is configured by higher layer signaling. It will be appreciated that for specific implementations of the relevant parameters in equation (28) and equation (29), reference may be made to implementations of the foregoing examples, which are not described in detail herein.
Further, in this case, the transmission power of the PSSCH may satisfy the following formula:
Figure BDA0001965151310000202
optionally, the transmit power of the PSSCH may also satisfy the following formula:
Figure BDA0001965151310000211
it will be appreciated that for specific implementations of the relevant parameters in equation (30) and equation (31), reference may be made to implementations of the foregoing examples, which are not described in detail herein.
In some embodiments, as shown at 9a in fig. 9, since the PSFCH and the PSCCH are frequency division multiplexed, the transmit power of the PSFCH may be determined by the power difference between the PSCCH and the PSFCH. Thus, the formula satisfied by the PSFCH of 9a in fig. 9 can refer to the specific embodiments of formula (28) and formula (29) shown in 8b in fig. 8, and will not be described in detail here. And the formula satisfied by the PSFCH in 9b of fig. 9 can also refer to the specific embodiments of formula (28) and formula (29) shown in 8b of fig. 8. It will be appreciated that although there is a power difference between the PSCCH and the PSFCH in fig. 9, whether the power difference between the PSCCH and the PSFCH in fig. 9 is the same as the power difference between the PSCCH and the PSFCH in fig. 8 is not limited in this embodiment.
Further, 9b in fig. 9, the transmit power of the pssch may satisfy the following formula:
Figure BDA0001965151310000212
optionally, the transmit power of the PSSCH may also satisfy the following formula:
Figure BDA0001965151310000213
wherein z in the formulas (32) and (33) is a power difference between PSFCH and PSSCH.
It will be appreciated that for specific implementations of the relevant parameters in equations (32) and (33), reference may be made to implementations of the foregoing examples, which are not described in detail herein.
It will be appreciated that although some parameters in the above formulas are the same, in a specific implementation, different frame structures, i.e. the structures corresponding to fig. 7 to 9, may take different values. Such as the possible x values in fig. 7 and 8, and the y values in fig. 8 and 9, etc., are not listed here.
It will be appreciated that each of the above embodiments has a focus, and thus that implementation in one embodiment that is not described in detail may be referred to implementation in other embodiments.
It should be noted that, the unit of the formula in each embodiment shown in the present application is not described in detail, and it is understood that the unit of the transmission power of each channel in each of the foregoing embodiments is dBm.
It should be noted that, in the various embodiments shown in the present application, the bandwidth, such as the PSSCH bandwidth, the PSCCH bandwidth, and the PSFCH bandwidth may be in units of the number of Resource Blocks (RBs). I.e. the bandwidth in each of the embodiments described above is represented by the number of RBs.
The power control apparatus provided in the embodiments of the present application will be described in detail below, where the apparatus may be a terminal device (such as a first terminal device), or a component or a chip in the terminal device that implements the foregoing functions, and the apparatus may be used to perform the methods described in the embodiments of the present application.
Referring to fig. 10, fig. 10 is a schematic structural diagram of a power control device provided in an embodiment of the present application, where the power control device may be used to perform the method described in the embodiment of the present application, and as shown in fig. 10, the power control device includes:
A processing unit 1001, configured to determine a transmit power of a data channel; wherein, the data channel includes first information, and the first information includes feedback information;
a transmitting unit 1002, configured to transmit the feedback information to the second terminal device at the transmission power of the data channel.
In the embodiment of the application, when the time-frequency domain resource of the data channel is overlapped with that of the feedback channel, the feedback information can be sent along with the data channel, so that the embodiment of the application improves the transmitting power of the data channel, and the transmitting power of the data channel under the condition is more accurately distributed.
In one possible implementation manner, the transmitting power of the data channel is determined according to the maximum transmitting power, the bandwidth of the data channel and the first adjustment parameter;
alternatively, the transmission power of the data channel is determined according to the maximum transmission power, the bandwidth of the data channel, the bandwidth of the control channel, and the first adjustment parameter.
In one possible implementation manner, the first adjustment parameter is determined according to a first sub-parameter and a second sub-parameter, where the first sub-parameter is a parameter related to adjusting the coding strategy MCS, the second sub-parameter is a parameter related to the number of resource elements REs of the data channel and the size of the coding block, or the second sub-parameter is a parameter related to the number of REs of the data channel and the number of bits of the feedback information.
In one possible implementation manner, the first adjustment parameter is determined according to a first sub-parameter, a second sub-parameter and a third sub-parameter, where the first sub-parameter is a parameter related to adjusting the coding strategy MCS, the second sub-parameter is a parameter related to the number of resource elements REs of the data channel and the size of the coding block, or the second sub-parameter is a parameter related to the number of REs of the data channel and the number of bits of the feedback information, and the third sub-parameter is an offset parameter related to the number of bits of the feedback information.
In a possible implementation manner, the feedback information includes hybrid automatic repeat request HARQ information, or the feedback information includes reference information, or the feedback information includes the HARQ information and the reference information; wherein the reference information includes information between the first terminal device and the second terminal device, and/or information between the first terminal device and a network device.
In one possible implementation manner, the reference information includes one or more of reference state information between the first terminal device and the second terminal device, reference signal received power, reference signal received quality, and path loss information between the first terminal device and the second terminal device.
In one possible implementation, the transmit power of the data channel satisfies the following formula:
P 1 ＝min{P CMAX ,f 1 (M 1 )+P O +α×PL+β}
wherein, P is as described above 1 For the transmission power of the data channel, the P CMAX For the maximum transmit power, f is 1 (M 1 ) Bandwidth M for the data channel 1 Is a function of P O The PL is a path loss estimated value, and the β is the first adjustment parameter, for the target received power of the second terminal device.
In one possible implementation, the transmit power of the data channel satisfies the following formula:
P 1 ＝f 2 (M 1 +M 2 )+min{P CMAX ,f 3 (M 1 +M 2 )+P O +α×PL+β}
wherein, P is as described above 1 For the transmission power of the data channel, the P CMAX For the maximum transmit power, f is 2 (M 1 +M 2 ) And f is as above 3 (M 1 +M 2 ) The bandwidths M of the data channels 1 And the bandwidth M of the control channel 2 Is a function of P O The PL is a path loss estimated value, and the β is the first adjustment parameter, for the target received power of the second terminal device.
In one possible implementation, the transmit power of the data channel satisfies the following formula:
P 1 ＝min{P CMAX -f 4 (M 1 +M 2 ),f 3 (M 1 +M 2 )+P O +α×PL+β}
wherein, P is as described above 1 For the transmission power of the data channel, the P CMAX For the maximum transmit power, f is 3 (M 1 +M 2 ) And f is as above 4 (M 1 +M 2 ) The bandwidths M of the data channels 1 And the bandwidth M of the control channel 2 Is a function of P O The PL is a path loss estimated value, and the β is the first adjustment parameter, for the target received power of the second terminal device.
It is to be understood that when the above-mentioned power control apparatus is a terminal device or a component in a terminal device implementing the above-mentioned functions, the processing unit 1001 may be one or more processors, and the transmitting unit 1002 may be a transmitter. When the power control device is a chip, the processing unit 1001 may be one or more processors, and the transmitting unit 1002 may be an output interface. In a possible implementation manner, the power control apparatus may further include a receiving unit, where the power control apparatus is a terminal device or a component for implementing the function in the terminal device, the receiving unit (not shown in the drawing) may be a receiver, or the transmitting unit 1002 and the receiving unit are integrated into one device, for example, a transceiver. In the case that the power control device is a chip, the receiving unit may be an input interface, or the transmitting unit 1002 and the receiving unit are integrated into one unit, for example, an input-output interface.
In some embodiments of the present application, the power control apparatus shown in fig. 10 may be further used to perform the following operations:
A processing unit 1001, configured to determine a transmit power of a feedback channel; wherein the feedback channel and the data channel have time domain overlapping and frequency domain overlapping, or the feedback channel and the data channel have frequency domain overlapping and no time domain overlapping, or the feedback channel and the data channel have time domain overlapping and no frequency domain overlapping;
a transmitting unit 1002, configured to transmit feedback information to the second terminal device at the transmission power of the feedback channel.
In this embodiment of the present application, the multiplexing manner between the feedback channel and the data channel may include multiple possibilities (i.e., different frame structures), for example, the feedback channel may have time domain overlapping and frequency domain overlapping with the data channel, for example, the feedback channel may have frequency domain overlapping and no time domain overlapping with the data channel, and for example, the feedback channel may have time domain overlapping and no frequency domain overlapping with the data channel, where different multiplexing manners correspond to different transmission powers, so that the terminal device may determine the transmission power of the feedback channel according to one of multiple possibilities, and avoid determining the transmission power of the feedback channel by adopting one manner under all conditions, thereby effectively improving accuracy of determining the transmission power of the feedback channel and reasonably controlling the transmission power of the feedback channel.
In one possible implementation manner, the transmitting power of the feedback channel is determined according to the maximum transmitting power, the bandwidth of the feedback channel, the bandwidth of the data channel, the power difference between the feedback channel and the data channel, and the second adjustment parameter;
or, the transmitting power of the feedback channel is determined according to the maximum transmitting power, the bandwidth of the feedback channel, the bandwidth of the control channel, the power difference between the feedback channel and the control channel, and a second adjustment parameter.
In a possible implementation manner, the second adjustment parameter is configured by higher layer signaling, or the second adjustment parameter is predefined.
In one possible implementation, the second adjustment parameter is related to the number of bits of the feedback information and the number of resource elements REs of the feedback channel.
In a possible implementation manner, the power difference between the feedback channel and the data channel is predefined, or the power difference between the feedback channel and the data channel is indicated by control information; or, the power difference between the feedback channel and the data channel is configured by high-layer signaling;
The power difference between the feedback channel and the control channel is predefined, or the power difference between the feedback channel and the control channel is indicated by the control information; alternatively, the power difference between the feedback channel and the control channel is configured by the higher layer signaling.
In a possible implementation manner, the feedback information includes hybrid automatic repeat request HARQ information, or the feedback information includes reference information, or the feedback information includes the HARQ information and the reference information; wherein the reference information includes information between the first terminal device and the second terminal device, and/or information between the first terminal device and a network device.
In one possible implementation manner, the reference information includes one or more of reference state information between the first terminal device and the second terminal device, reference signal received power, reference signal received quality, and path loss information between the first terminal device and the second terminal device.
In one possible implementation, the transmission power of the feedback channel satisfies the following formula:
P 2 ＝f 5 (M 1 +M 3 )+min{P CMAX ,f 6 (M 1 +M 3 )+P O +α×PL+Δ}
Wherein, P is as described above 2 For the transmission power of the feedback channel, the P CMAX For the maximum transmit power, f is 5 (M 1 +M 3 ) And f is as above 6 (M 1 +M 3 ) The bandwidths M of the data channels 1 Bandwidth M of the feedback channel 3 And a function of the power difference between the feedback channel and the data channel, P O The PL is a path loss estimated value, and the Δ is the second adjustment parameter, for the target received power of the second terminal device.
In one possible implementation, the transmission power of the feedback channel satisfies the following formula:
P 2 ＝f 7 (M 2 +M 3 )+min{P CMAX ,f 8 (M 2 +M 3 )+P O +α×PL+Δ}
wherein, P is as described above 2 For the transmission power of the feedback channel, the P CMAX For the maximum transmit power, f is 7 (M 2 +M 3 ) And f is as above 8 (M 2 +M 3 ) The bandwidths M of the control channels 2 Bandwidth M of the feedback channel 3 And a function of the power difference between the feedback channel and the control channel, P O The PL is a path loss estimated value, and the Δ is the second adjustment parameter, for the target received power of the second terminal device.
It will be appreciated that the specific embodiment of the power control apparatus shown in fig. 10 may correspond to the method embodiment shown in fig. 5 and 6, and the specific embodiments of formulas (7) to (33) shown in fig. 7 to 9, which will not be described in detail here.
Referring to fig. 11, fig. 11 is a schematic structural diagram of a terminal device 1100 according to an embodiment of the present application. The terminal device may perform the operation of the first terminal device in the methods shown in fig. 5 and 6, or the terminal device may perform the operation of the power control apparatus shown in fig. 10.
For convenience of explanation, fig. 11 shows only major components of the terminal device. As shown in fig. 11, the terminal device 1100 includes a processor, a memory, a radio frequency link, an antenna, and input-output means. The processor is mainly used for processing communication protocols and communication data, controlling the whole terminal equipment, executing software programs, and processing data of the software programs, for example, for supporting the terminal equipment to execute the processes described in fig. 5 and 6. The memory is mainly used for storing software programs and data. The radio frequency link is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. The terminal device 1100 may also include input-output means, such as a touch screen, a display screen, a keyboard, etc., for mainly receiving data input by a user and outputting data to the user. It should be noted that some kinds of terminal apparatuses may not have an input/output device.
When the terminal device is started, the processor can read the software program in the storage unit, interpret and execute the software program, and process the data of the software program. When data is required to be transmitted wirelessly, the processor carries out baseband processing on the data to be transmitted and then outputs a baseband signal to the radio frequency link, and the radio frequency link carries out radio frequency processing on the baseband signal and then transmits the radio frequency signal outwards in the form of electromagnetic waves through the antenna. When data is sent to the terminal equipment, the radio frequency link receives radio frequency signals through the antenna, converts the radio frequency signals into baseband signals, and outputs the baseband signals to the processor, and the processor converts the baseband signals into data and processes the data.
Those skilled in the art will appreciate that for ease of illustration, only one memory and processor is shown in fig. 11. In an actual terminal device, there may be multiple processors and memories. The memory may also be referred to as a storage medium or storage device, etc., and embodiments of the present application are not limited in this regard.
As an alternative implementation, the processor may include a baseband processor and a central processing unit (central processing unit, CPU), where the baseband processor is mainly used to process the communication protocol and the communication data, and the CPU is mainly used to control the entire terminal device, execute a software program, and process the data of the software program. Alternatively, the processor may be a network processor (network processor, NP) or a combination of CPU and NP. The processor may further comprise a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (programmable logic device, PLD), or a combination thereof. The PLD may be a complex programmable logic device (complex programmable logic device, CPLD), a field-programmable gate array (field-programmable gate array, FPGA), general-purpose array logic (generic array logic, GAL), or any combination thereof. The memory may include volatile memory (RAM), such as random-access memory (RAM); the memory may also include a nonvolatile memory (non-volatile memory), such as a flash memory (flash memory), a hard disk (HDD) or a Solid State Drive (SSD); the memory may also comprise a combination of the above types of memories.
For example, in the application embodiment, the antenna and the radio frequency link with the transceiving function may be regarded as the transceiving unit 1101 of the terminal device 1100, and the processor with the processing function may be regarded as the processing unit 1102 of the terminal device 1100.
As shown in fig. 11, the terminal device 1100 may include a transceiving unit 1101 and a processing unit 1102. The transceiver unit may also be referred to as a transceiver, transceiver device, etc. Alternatively, a device for implementing a receiving function in the transceiver unit 1101 may be regarded as a receiving unit, and a device for implementing a transmitting function in the transceiver unit 1101 may be regarded as a transmitting unit, that is, the transceiver unit 1101 includes a receiving unit and a transmitting unit. For example, the receiving unit may also be referred to as a receiver, a receiving circuit, etc., and the transmitting unit may be referred to as a transmitter, a transmitting circuit, etc.
In some embodiments, the transceiver 1101 and the processing unit 1102 may be integrated into one device or may be separated into different devices, and furthermore, the processor and the memory may be integrated into one device or may be separated into different devices. For example, in one embodiment, the transceiving unit 1101 may be configured to perform the method illustrated by step 502 shown in fig. 5. As another example, in one embodiment, the transceiver unit 1101 may also be used to perform the method shown in step 602 of fig. 6.
As another example, in one embodiment, the processing unit 1102 may be configured to perform a method of controlling the transceiver unit 1101 to perform the method of step 502 shown in fig. 5, and the processing unit 1102 may also be configured to control the transceiver unit 1101 to perform the method of step 602 shown in fig. 6.
As another example, in one embodiment, the processing unit 1102 may also be configured to perform the method illustrated by step 501 of fig. 5, and the method illustrated by step 601 of fig. 6.
As another example, in one embodiment, the transceiver unit 1101 may also be configured to perform the method shown in the transmitting unit 1002. As another example, in one embodiment, the processing unit 1102 may also be configured to perform the method illustrated by the processing unit 1001.
It can be understood that, for implementation of the terminal device in the embodiments of the present application, reference may be specifically made to the foregoing embodiments, which are not described in detail herein.
Embodiments of the present application also provide a computer-readable storage medium. All or part of the flow of the above method embodiments may be implemented by a computer program to instruct related hardware, where the program may be stored in the above computer storage medium, and when the program is executed, the program may include the flow of each method embodiment as described above. The computer readable storage medium may be an internal storage unit of the power control apparatus (including the data transmitting end and/or the data receiving end) of any of the foregoing embodiments, for example, a hard disk or a memory of the power control apparatus. The computer readable storage medium may be an external storage device of the power control apparatus, for example, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) card, a flash card (flash card) or the like provided in the power control apparatus. Further, the computer readable storage medium may further include both an internal storage unit and an external storage device of the power control apparatus. The computer-readable storage medium is used to store the computer program and other programs and data required by the power control apparatus. The above-described computer-readable storage medium may also be used to temporarily store data that has been output or is to be output.
In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, produces a flow or function in accordance with embodiments of the present application, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in or transmitted across a computer-readable storage medium. The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a Solid State Disk (SSD)), or the like.
The steps in the method of the embodiment of the application can be sequentially adjusted, combined and deleted according to actual needs.
The modules in the device of the embodiment of the application can be combined, divided and deleted according to actual needs.
The above embodiments are merely for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims (23)

1. A method of power control, comprising:
the method comprises the steps that a first terminal device determines the transmitting power of a data channel; the data channel comprises first information, wherein the first information comprises feedback information; the transmitting power of the data channel is determined according to the maximum transmitting power, the bandwidth of the data channel and a first adjusting parameter; or, the transmitting power of the data channel is determined according to the maximum transmitting power, the bandwidth of the data channel, the bandwidth of the control channel and the first adjustment parameter;
And the first terminal equipment sends the feedback information to the second terminal equipment by the transmitting power of the data channel.
2. The method of claim 1, wherein the first adjustment parameter is determined from a first sub-parameter and a second sub-parameter; the first sub-parameter is a parameter related to modulation and coding strategy MCS, and the second sub-parameter is a parameter related to the number of resource elements REs of the data channel and the size of a coding block, or the second sub-parameter is a parameter related to the number of REs of the data channel and the number of bits of the feedback information.
3. The method of claim 1, wherein the first adjustment parameter is determined from a first sub-parameter, a second sub-parameter, and a third sub-parameter; the first sub-parameter is a parameter related to modulation and coding strategy MCS, the second sub-parameter is a parameter related to the number of resource elements REs of the data channel and the size of a coding block, or the second sub-parameter is a parameter related to the number of REs of the data channel and the number of bits of the feedback information, and the third sub-parameter is an offset parameter related to the number of bits of the feedback information.
4. A method according to any of claims 1-3, characterized in that the feedback information comprises hybrid automatic repeat request, HARQ, information, or the feedback information comprises reference information, or the feedback information comprises the HARQ information and the reference information; wherein the reference information comprises information between the first terminal device and the second terminal device and/or information between the first terminal device and a network device.
5. The method of claim 4, wherein the reference information comprises one or more of reference state information between the first terminal device and the second terminal device, reference signal received power, reference signal received quality, and path loss information between the first terminal device and the second terminal device.
6. A method of power control, comprising:
the first terminal equipment determines the transmitting power of a feedback channel; wherein the feedback channel and the data channel have time domain overlapping and frequency domain overlapping, or the feedback channel and the data channel have frequency domain overlapping and no time domain overlapping, or the feedback channel and the data channel have time domain overlapping and no frequency domain overlapping; the transmitting power of the feedback channel is determined according to the maximum transmitting power, the bandwidth of the feedback channel, the bandwidth of the data channel, the power difference between the feedback channel and the data channel and a second adjustment parameter; or, the transmitting power of the feedback channel is determined according to the maximum transmitting power, the bandwidth of the feedback channel, the bandwidth of the control channel, the power difference between the feedback channel and the control channel and a second adjustment parameter;
And the first terminal equipment sends feedback information to the second terminal equipment by the transmitting power of the feedback channel.
7. The method of claim 6, wherein the second adjustment parameter is configured by higher layer signaling or is predefined.
8. The method of claim 6, wherein the second adjustment parameter relates to a number of bits of the feedback information and a number of resource elements, REs, of the feedback channel.
9. The method according to any of claims 6-8, wherein the power difference of the feedback channel and the data channel is predefined or indicated by control information; or, the power difference between the feedback channel and the data channel is configured by high-layer signaling;
the power difference between the feedback channel and the control channel is predefined, or the power difference between the feedback channel and the control channel is indicated by the control information; alternatively, the power difference between the feedback channel and the control channel is configured by the higher layer signaling.
10. The method according to any of claims 6-8, wherein the feedback information comprises hybrid automatic repeat request, HARQ, information, or the feedback information comprises reference information, or the feedback information comprises the HARQ information and the reference information; wherein the reference information comprises information between the first terminal device and the second terminal device and/or information between the first terminal device and a network device.
11. The method of claim 10, wherein the reference information comprises one or more of reference state information between the first terminal device and the second terminal device, reference signal received power, reference signal received quality, and path loss information between the first terminal device and the second terminal device.
12. A terminal device, characterized in that the terminal device is used as a first terminal device comprising a processor, a memory and a transceiver, the processor being coupled to the memory;
the processor is used for determining the transmitting power of the data channel; the data channel comprises first information, wherein the first information comprises feedback information; the transmitting power of the data channel is determined according to the maximum transmitting power, the bandwidth of the data channel and a first adjusting parameter; or, the transmitting power of the data channel is determined according to the maximum transmitting power, the bandwidth of the data channel, the bandwidth of the control channel and the first adjustment parameter;
the transceiver is coupled to the processor and is configured to transmit the feedback information to a second terminal device at a transmit power of the data channel.
13. The terminal device of claim 12, wherein the first adjustment parameter is determined according to a first sub-parameter and a second sub-parameter; the first sub-parameter is a parameter related to modulation and coding strategy MCS, and the second sub-parameter is a parameter related to the number of resource elements REs of the data channel and the size of a coding block, or the second sub-parameter is a parameter related to the number of REs of the data channel and the number of bits of the feedback information.
14. The terminal device of claim 12, wherein the first adjustment parameter is determined according to a first sub-parameter, a second sub-parameter, and a third sub-parameter; the first sub-parameter is a parameter related to modulation and coding strategy MCS, the second sub-parameter is a parameter related to the number of resource elements REs of the data channel and the size of a coding block, or the second sub-parameter is a parameter related to the number of REs of the data channel and the number of bits of the feedback information, and the third sub-parameter is an offset parameter related to the number of bits of the feedback information.
15. The terminal device according to any of claims 12-14, wherein the feedback information includes hybrid automatic repeat request, HARQ, information, or the feedback information includes reference information, or the feedback information includes the HARQ information and the reference information; wherein the reference information comprises information between the first terminal device and the second terminal device and/or information between the first terminal device and a network device.
16. The terminal device of claim 15, wherein the reference information comprises one or more of reference state information between the first terminal device and the second terminal device, reference signal received power, reference signal received quality, and path loss information between the first terminal device and the second terminal device.
17. A terminal device, characterized in that the terminal device is used as a first terminal device comprising a processor, a memory and a transceiver, the processor being coupled to the memory;
the processor is used for determining the transmitting power of a feedback channel; wherein the feedback channel and the data channel have time domain overlapping and frequency domain overlapping, or the feedback channel and the data channel have frequency domain overlapping and no time domain overlapping, or the feedback channel and the data channel have time domain overlapping and no frequency domain overlapping; the transmitting power of the feedback channel is determined according to the maximum transmitting power, the bandwidth of the feedback channel, the bandwidth of the data channel, the power difference between the feedback channel and the data channel and a second adjustment parameter; or, the transmitting power of the feedback channel is determined according to the maximum transmitting power, the bandwidth of the feedback channel, the bandwidth of the control channel, the power difference between the feedback channel and the control channel and a second adjustment parameter;
The transceiver is coupled to the processor and is configured to transmit feedback information to a second terminal device at a transmit power of the feedback channel.
18. The terminal device of claim 17, wherein the second adjustment parameter is configured by higher layer signaling or is predefined.
19. The terminal device of claim 17, wherein the second adjustment parameter relates to a number of bits of the feedback information and a number of resource elements, REs, of the feedback channel.
20. The terminal device according to any of claims 17-19, characterized in that the power difference of the feedback channel and the data channel is predefined or indicated by control information; or, the power difference between the feedback channel and the data channel is configured by high-layer signaling;
the power difference between the feedback channel and the control channel is predefined, or the power difference between the feedback channel and the control channel is indicated by the control information; alternatively, the power difference between the feedback channel and the control channel is configured by the higher layer signaling.
21. The terminal device according to any of claims 17-19, wherein the feedback information includes hybrid automatic repeat request, HARQ, information, or the feedback information includes reference information, or the feedback information includes the HARQ information and the reference information; wherein the reference information comprises information between the first terminal device and the second terminal device and/or information between the first terminal device and a network device.
22. The terminal device of claim 21, wherein the reference information comprises one or more of reference state information between the first terminal device and the second terminal device, reference signal received power, reference signal received quality, and path loss information between the first terminal device and the second terminal device.
23. A computer readable storage medium storing program instructions which, when executed by a processor of a computer, cause the processor to perform the method of any one of claims 1-11.
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